On 02/16/2018 05:05 AM, Fatima wrote: > I have to make a biofilter that consists of bacteria to produce drinkable water. And my question is, is this possible? > And if so, does someone know how I can make it?

Koi pond operators often build sand filters where the top layer is a bacterial mat. They need constant flow, or at least surges every so often to keep that ecosystem happy. It's not ready to drink though -- you'd need further treatment for heavy metals, something to take out smells, algae zones to oxygenate and have a different set of bacteria in that stage...

And to be safe it would have to have many stages in series with a big delay, and testing along the way for pathogens, parasitic creatures, and making sure conditions are always wrong for bad bugs to grow, since it is all live ecosystems working for you. Seems like a good life goal -- no quick answers here.

Is there a licensing process required in the EU for creating a biolab where microorganisms are genetically modified and fermented and what is this process like? I'm interested in starting such a laboratory.